Yamaha Vino 70cc sluggish acceleration after 1st run
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Uploader Comments (rsteag)
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I just installed the Malossi variator, Tecnigas Next R pipe, and kevlar belt; already had the Michelin oversize tires. First test ride I got 49 mph, but I'm gonna do some more tinkering.
Know anybody that's installed an up-gear? I think I have enough power to try it.
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Did you upgrade the pipe and variator also or just the piston kit?
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soak-clean the carb, have all the needles at the base settings?
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No. The problem was with the torque spring. Replacing it resolved all sluggishness. As it heated up, it was weakening which caused the gearing to go into high way to fast.
rsteag 3 years ago
I solved the issue with a new 1500 RPM torque spring. The other one was weak/damaged. Now... its very fast up to about 52mph with no sluggish spots.
rsteag 4 years ago
I was doing these runs on about 1/8 mile asphalt straight on my driveway. The ground is flat. The sluggish acceleration always happens after the first time I get it up to speed, slow back down, and go again. Any ideas what is causing this sluggish acceleration?
rsteag 4 years ago